Disk crank.



F. E. SUTHBRLAND & J. A. BROWN.

DISK CRANK.

APPLICATION FILED NOV. 9, 1909.

Patented Jan, 24, 1911.

.Wffnea; ea

UNITE STATES PATENT OFFICE.

FRED E. SUTHERLAND AND JAMES A. BROWN, 0]? LOS ANGELES, CALIFORNIA,ASSIGN- ORS TO THE RADIAL POWER HAMMER COMPANY, OF LOS AN GELES,CALIFORNIA,

A. CORPORATION OF CALIFORNIA.

DISK CRANK.

Patented Jan. 24, 1911.

Divided and this application filed November 9,

1909. Serial No. 527,088.

To all whom it may concern:

Be it known that we, FRED E. SUTHERLAND and JAMES A. BROWN, citizens ofthe United States of America, residing at Los Angeles, county of LosAngeles, State of California, have invented a certain new and usefulDisk Crank; and we do hereby declare the following to be a full, clear,and exact de scription of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This application is a division of applica tion Serial No. 498,765, filedMay 27 1909.

The invention relates to disk cranks, and one of its objects is toprovide simple and effective means whereby the crank pin may be veryreadily and accurately adjusted in any desired position toward or awayfrom the center of rotation of the disk crank to fix the amount ofthrow.

With the above and other objects and ad vantages in view, as will beapparent to those skilled in the art, the invention consists in thepeculiar construction, arrangement and combination of the various partsof the device as set forth in this specification and particularlypointed out in the claims.

In the accompanying drawings, which illustrate one form of constructionfor a device embodying the invention, Figure l is a sectional elevationof the disk crank, showing it operatively connected with hammermechanism; Fig. 2 is a plan view of the disk crank shown in Fig. 1,removed; Fig. 3 is an elevational View of the disk crank taken on line3-3 of Fig. 2.

Referring to the drawings, the disk 2, which in this instance is shownrigidly mounted on shaft 3 journaled in bearing 4 on frame 5, isprovided with a rear cen tral opening 7 whereby it may be fitted on theshaft 3. Through the disk 2 near the front portion thereof is provided adiametrical cylindrical opening 8 having a portion 9 thereof, to oneside of the center of the disk, of reduced diameter. A slot 10, less inwidth than the diameter of the enlarged portion 11 of opening 8, isformed centrally in the front face of the disk to communicate with theopening 8 substantially throughout the length of the enlarged portion11. In the openlng 8 is disposed a screw 12, the head 13 of which may beprovided with a squared socket l4. and formed to fit in that portion ofthe opening shown in Fig. 1 below the reduced portion 9. On the threadedportion of the screw 12 is mounted the hub 15, which may be an integralpart of the pin 16 extending through the slot 10 and forwardly of thefront face of the disk 2. The hub 15, as shown at 17 in Fig. 2, is splitcent-rally longitudinally to the screw 12 at the rear thereof, and italso has the front portion 18 thereof toward slot 10, formed to providea curved surface having a greater radius than that of the enlargedportion 11 of opening 8. On pin 16 may be freely mountedthe sleeve 19having a flange 20 and which in this instance is shown as having mountedthereon the hammer mechanism 21. A washer 22 and a nut 23 are fitted onthe forward end of pin 16. As will be understood from the foregoingdescription, when it is desired to change the throw of the crank disk,it can be accomplished very readily by first rotating the crank disk tobring the screw head 13 above the reduced portion 9 and then looseningthe nut 23 on the pin 16 to free the front surface of the hub 15 frompressure against the interior wall of opening 8, after which screw 1.2can be turned by means of a key applied in socket 14. to move the pin 16the necessary distance toward or away from the center of rotation of thedisk 2, whereupon the nut 23 can be tightened to lock the parts inposition by causing a closing of the hub on the screw by pressure of thecurved surface of portion 18 against the interior wall of opening 8.

lVhile one form of construction in which the invention may be embodiedhas been illustrated and described, it is obvious that variousmodifications and changes can be made which do not depart from thespirit and scope of the invention as defined in the appended claims.

WVe claim:

1. The combination of a disk having a slot communicating with an openingtherein, a screw disposed within said openin ga pin having a split hubon said screw, anc means whereby said hub is drawn against the interiorwall of said opening to lock the screw against rotation.

2. The combination of a disk having a passing through said hub, andmeans to' draw the aforesaid portion of the split hub against theinterior wall of said opening.

. 3. The combination of a disk having a slot in communication with acylindrical opening therein, with a pin having a split hub with aportion thereof having a greater 1 radius than that of the opening ascrew passing through said hub, a sleeve on said esasaa pin, and a nutthreaded on the end of said pm. I

In testimony whereof, we have signed our names'to this specification inthe presence of two subscribing witnesses at Los Angeles, county of LosAngeles, State of California, this 2d day of November A. D. 1909.

FRED E. SUTHERLAND. 7 JAMES A. BROWN.

Witnesses v ALEX. GUR'RIE,

Grno. Downs.

